Revert #381

[dbeatty10]

Prior to datafold#381, there were 3 different output formats:

• default
• --stats
• --json

Afterwards, there was a new 4th format, and it only applied to --dbt mode.

Two things I'd like:

1. As a user of the --dbt mode, I'd prefer that I can use the same output format options as the regular data-diff command.
2. If a 4th output option is added, I'd like to be able to use a command-line flag to opt-in to it with a --spruce flag (or some other name for the new format).

To get those two things, I'll do the following:

1. Revert the new spruced-up output in #381 (which can be added back later if desired)
2. Make all 3 of the pre-existing format options available when using --dbt